<template>
<div>
  <!-- 面包屑导航 -->
  <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>商品管理</el-breadcrumb-item>
    <el-breadcrumb-item>商品列表</el-breadcrumb-item>
  </el-breadcrumb>
  <!-- 卡片视图区 -->
  <el-card>
    <!-- 添加 搜索区 -->
    <el-row :gutter="10">
      <el-col :span="8">
        <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
          <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
        </el-input>
      </el-col>
      <el-col :span="4">
        <el-button type="primary" @click="goAddPage">添加商品</el-button>
      </el-col>
    </el-row>
    <!-- 商品 列表区 -->
    <el-table :data="goodsList" border stripe>
      <el-table-column type="index" label="序号" width="50px"></el-table-column>
      <el-table-column label="商品名称" prop="goods_name"></el-table-column>
      <el-table-column label="商品价格(元）" prop="goods_price" width="115px"></el-table-column>
      <el-table-column label="商品重量" prop="goods_weight" width="80px"></el-table-column>
      <el-table-column label="创建时间" prop="add_time" width="160px">
        <template slot-scope="scope">
          {{scope.row.add_time | dateFormat}}
        </template>
      </el-table-column>
      <el-table-column label="操作" width="120px">
        <template slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row.goods_id)"></el-button>
        </template>
      </el-table-column>
    </el-table>
    <!-- 分页区 -->
    <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[5, 10, 20, 50]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total" background>
    </el-pagination>
  </el-card>
</div>
</template>

<script>
export default {
  name: 'goods',
  data () {
    return {
      /* 查询参数对象 */
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      /* 商品列表 */
      goodsList: [],
      /* 总数据条数 */
      total: 0
    }
  },
  created () {
    this.getGoodsList()
  },
  methods: {
    /* 根据分页 获取商品列表 */
    async getGoodsList () {
      const { data: res } = await this.$http.get('/goods', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('商品列表数据获取失败！')
      }
      this.goodsList = res.data.goods
      this.total = res.data.total
      return this.$message.success('商品列表数据获取成功！')
    },
    /* 当前页显示数量 改变触发 */
    handleSizeChange (newPageS) {
      this.queryInfo.pagesize = newPageS
      this.getGoodsList()
    },
    /* 当前页码改变触发 */
    handleCurrentChange (newPageN) {
      this.queryInfo.pagenum = newPageN
      this.getGoodsList()
    },
    /* 删除商品 */
    async removeById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(error => error)
      /* cancel 取消 confirm 确认 */
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除操作！')
      }
      const { data: res } = await this.$http.delete(`/goods/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除操作失败！')
      }
      this.getGoodsList()
      return this.$message.success('删除成功！')
    },
    /* 前往添加商品页面 */
    goAddPage () {
      this.$router.push('/goods/add')
    }
  }
}
</script>

<style lang="less" scoped>
</style>
